CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Current assets	$ 225,937	$ 420,426
Property and equipment, net	736,462	880,032
Intercompany notes and accounts receivable and investment in subsidiaries	0	0
Other assets	33,222	27,340
TOTAL ASSETS	995,621	1,327,798	$ 1,494,024
LIABILITIES AND EQUITY
Current liabilities	1,090,615	154,483
Long-term debt		961,700
Intercompany notes and accounts payable	0	0
Deferred tax liabilities	0	14,252
Other long-term liabilities	68,103	57,073
Equity	(163,097)	140,290	$ 292,681	$ 1,058,063
TOTAL LIABILITIES AND EQUITY	995,621	1,327,798
Parent Company
ASSETS
Current assets	66,750	202,688
Property and equipment, net	0	0
Intercompany notes and accounts receivable and investment in subsidiaries	1,925,670	2,107,092
Other assets	870	0
TOTAL ASSETS	1,993,290	2,309,780
LIABILITIES AND EQUITY
Current liabilities	987,478	35,233
Long-term debt		961,700
Intercompany notes and accounts payable	1,162,645	1,162,648
Deferred tax liabilities		3,658
Other long-term liabilities	6,279	6,267
Equity	(163,112)	140,274
TOTAL LIABILITIES AND EQUITY	1,993,290	2,309,780
Guarantor Subsidiaries
ASSETS
Current assets	121,388	192,083
Property and equipment, net	730,300	869,150
Intercompany notes and accounts receivable and investment in subsidiaries	1,419,901	1,226,433
Other assets	30,541	16,885
TOTAL ASSETS	2,302,130	2,304,551
LIABILITIES AND EQUITY
Current liabilities	69,290	101,594
Long-term debt		0
Intercompany notes and accounts payable	2,651,259	2,731,926
Deferred tax liabilities		15,159
Other long-term liabilities	61,824	50,229
Equity	(480,243)	(594,357)
TOTAL LIABILITIES AND EQUITY	2,302,130	2,304,551
Non-Guarantor Subsidiaries
ASSETS
Current assets	37,799	25,655
Property and equipment, net	6,162	10,882
Intercompany notes and accounts receivable and investment in subsidiaries	(2,592)	87,435
Other assets	1,811	10,455
TOTAL ASSETS	43,180	134,427
LIABILITIES AND EQUITY
Current liabilities	33,847	17,656
Long-term debt		0
Intercompany notes and accounts payable	218,833	125,565
Deferred tax liabilities		(4,565)
Other long-term liabilities	0	577
Equity	(209,500)	(4,806)
TOTAL LIABILITIES AND EQUITY	43,180	134,427
Eliminations
ASSETS
Current assets	0	0
Property and equipment, net	0	0
Intercompany notes and accounts receivable and investment in subsidiaries	(3,342,979)	(3,420,960)
Other assets	0	0
TOTAL ASSETS	(3,342,979)	(3,420,960)
LIABILITIES AND EQUITY
Current liabilities	0	0
Long-term debt		0
Intercompany notes and accounts payable	(4,032,737)	(4,020,139)
Deferred tax liabilities		0
Other long-term liabilities	0	0
Equity	689,758	599,179
TOTAL LIABILITIES AND EQUITY	$ (3,342,979)	$ (3,420,960)